Changes in prey body size differentially reduces predation risk across predator and prey abundances

Changes in prey body size differentially reduces predation risk across predator and prey abundances
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猎物体型的变化不同程度地降低了捕食者和猎物丰度的捕食风险

DOI:
10.1111/oik.09933
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发表时间:
2023
期刊:
影响因子:
3.4
通讯作者:
Cortez, Michael
Cortez, Michael
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Hammill, Edd;Hancey, Kayla;Cortez, Michael

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Trophic interactions underpin the structure of ecological communities by describing the rates at which consumers exploit their resources. The rates at which predators consume their prey are influenced by prey traits, with many species inducing defensive modifications to prey traits following the threat of predation. Here we use different clonal lines of the protistParameciumbeing consumed byStenostomumpredators to highlight how differences in prey traits impact rates of predation. Clonal lines differed in their body width traits, and in their ability to induce changes in body width. By using a factorial cross of predator and prey abundances for different clonal lines we demonstrate how evolutionary or induced alterations in prey traits can impact the relative threat of predation. Our experiments show how interference among predators impacts predation rate, and how increased body width increased predator handling times. Given that reductions in the strength of interspecific interactions are associated with increased levels of overall community stability, our results indicate how individual level changes may scale up to impact whole communities.
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